CN204882223U - But loosening wedge load test anchor clamps - Google Patents

Abstract

The utility model relates to a detachable wedge load test fixture, which comprises an upper fixture (1), a lower fixture (2), a sleeve (3), an inclined pad (4) and a V-shaped fixture (5); the upper fixture (1) Including the neck that cooperates with the V-shaped clamp (5), the lower part of the sample is provided with a cavity (1.1), the cavity (1.1) has a large interior, a small outlet, and an inverted "convex" shape in cross section; The lower fixture (2) and the upper fixture (1) have the same structure and are located opposite to each other; the V-shaped fixture (5) is provided with two sets, which are respectively used for the upper fixture (1), the lower fixture (2) and the testing machine. Connection; one end of the sleeve (3) has an internal thread hole for connection with the sample, and the other end is used in conjunction with the cavity of the lower fixture (2); the inclined pad (4) is installed on the upper fixture (1 ) in the cavity, a circular hole is opened in the center of the inclined pad (4). The utility model has the advantages of simple structure, convenient installation and disassembly operation.

Description

A detachable wedge load test fixture

technical field

The utility model relates to a detachable wedge load test fixture, which is mainly used for testing the minimum tensile load, tensile strength and firmness of the junction between a head and a rod or a threaded part of a finished product of a bolt and a screw.

Background technique

Finished bolts and screws with or without flanged face, flat bearing surface or serrated surface, head with greater load capacity than threaded shank or unthreaded shank require a load test with minimum tensile load and head versus shank or thread The firmness of some junctions is an important inspection index for bolts and screws, and the quality of this index directly affects the performance of bolts and screws. At present, the test item is based on the test requirements of the wedge load specified in the GB/T3098.1-2010 "Mechanical Properties of Fastener Bolts, Screws and Studs" standard. This national standard only provides a written description of the principle of the testing equipment for the wedge load test. At present, there is no finished product testing equipment for this item in the testing equipment market, and this type of testing equipment is in a blank state in the market.

Contents of the invention

The purpose of the utility model is to overcome the above disadvantages and provide a detachable wedge load test fixture with simple structure and convenient operation.

The purpose of this utility model is achieved as follows: a detachable wedge load test fixture, which includes an upper fixture, a lower fixture, a sleeve, an inclined pad and a V-shaped fixture;

The upper clamp includes a neck matched with a V-shaped clamp, and a cavity is provided at the lower part of the sample. The cavity has a large interior, a small outlet, and an inverted "convex" shape in cross section;

The lower clamp has the same structure as the upper clamp and is located opposite to each other;

There are two sets of V-shaped clamps, which are respectively used for the connection between the upper clamp and the lower clamp and the testing machine; one end of the sleeve has an internal thread hole for connecting with the sample, and the other end is connected to the cavity of the lower clamp. With the use of;

The inclined pad is installed in the cavity of the upper fixture, and a round hole is opened in the center of the inclined pad, and the angle of the inclined pad and the diameter of the round hole are adjusted according to the size of the sample.

The utility model is a detachable wedge load test fixture, one side of the inclined pad is an arc surface.

The utility model has a detachable wedge load test fixture, and a cover plate is arranged outside the cavities of the upper fixture and the lower fixture.

The utility model is a detachable wedge load test fixture. The upper fixture is composed of two round rods with different diameters. The upper part is thin and the lower part is thick. Equipped with a nut, the thick rod is machined flat and hollowed out to form a cavity.

The utility model is a detachable wedge load test fixture, and the material of the upper fixture is forged steel.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model has the advantages of a detachable wedge load test fixture with simple structure and convenient installation and disassembly operation. The cover plate prevents the sample from flying out when it breaks, which is safe and reliable.

Description of drawings

Fig. 1 is a structural schematic diagram of the utility model detachable wedge load test fixture during work.

FIG. 2 is a schematic structural diagram of the upper clamp 1 and the V-shaped clamp 5 in FIG. 1 .

FIG. 3 is a schematic structural diagram of the sleeve 3 in FIG. 1 .

FIG. 4 is a top view of the V-shaped clamp 5 in FIG. 1 .

FIG. 5 is a schematic diagram of the structure of the inclined pad 4 in FIG. 1 .

in:

Upper fixture 1, lower fixture 2, sleeve 3, inclined pad 4, V-shaped fixture 5, sample 6, cavity 1.1.

Detailed ways

Referring to Figures 1-5, the utility model relates to a detachable wedge load test fixture. The forged steel part is processed into round bars with different diameters in the upper and lower parts. The end of the thin rod is processed into an external thread, the thick rod is processed into a plane, and the middle is hollowed out to form a cavity 1.1. The four corners are respectively processed with internal thread holes, and two sets are processed, one large and one small, which are used as the upper fixture 1 and the lower fixture respectively. 2. An internal threaded hole (equivalent to a nut) is respectively opened in the center of the two rounded square gaskets, and the diameter of the hole matches the diameter of the external threaded hole at the end of the above-mentioned fixture.

Process two sets of V-shaped fixtures 5, which are respectively used for fixing between the upper fixture 1, the lower fixture 2 and the testing machine.

A round hole is opened at the center of an inclined pad 4 that is curved on one side, and the angle of the inclined pad 4 and the diameter of the round hole can be adjusted according to the size of the bolt (ie sample 6).

Process a sleeve 3 with an internally threaded hole at one end, the diameter of the internally threaded hole matches the bolt of the sample 6, and the head at the other end of the sleeve 3 is used in conjunction with the cavity of the lower clamp 2.

When in use, the two clamps are respectively fixed on the upper and lower chucks of the testing machine through the V-shaped clamp 5 and two rounded square gaskets. Process two thin steel plates with holes in the four corners, which are respectively used as cover plates for the upper and lower fixture cavities. Pass the sample 6 through the inclined pad 4 and fix it with the sleeve 3, and fix the cover plate made of thin steel plate on the upper and lower fixtures with screws to prevent the sample from flying out when it breaks. Apply force steadily through the testing machine until the sample breaks to determine the minimum tensile load, tensile strength and firmness at the junction of the head and the stem or threaded part.

Claims (5)

1. A detachable wedge load test fixture, characterized in that it includes an upper fixture (1), a lower fixture (2), a sleeve (3), an inclined pad (4) and a V-shaped fixture (5); The upper clamp (1) includes a neck that cooperates with the V-shaped clamp (5). The lower part of the sample is provided with a cavity (1.1). The cavity (1.1) has a large interior, a small outlet, and an inverted "convex" shape in cross section. ; The lower fixture (2) has the same structure as the upper fixture (1), and the positions are opposite to each other; the V-shaped fixture (5) is provided with two sets, which are respectively used for the upper fixture (1), the lower fixture (2) and the test machine; one end of the sleeve (3) has an internal thread hole for connection with the sample, and the other end is used in conjunction with the cavity of the lower fixture (2); the inclined pad (4) is installed on the upper fixture In the cavity of (1), a round hole is opened in the center of the inclined pad (4), and the angle of the inclined pad (4) and the diameter of the round hole are adjusted according to the size of the sample (6). 2. A detachable wedge load test fixture according to claim 1, characterized in that one side of the inclined pad (4) is an arc surface. 3. A detachable wedge load test fixture according to claim 1, characterized in that: cover plates are provided outside the cavities of the upper fixture (1) and the lower fixture (2). 4. A detachable wedge load test fixture according to claim 1, characterized in that: the upper fixture (1) is composed of round rods with different diameters in the upper and lower parts, the upper end is thin, the lower end is thicker, the other There is a circular arc transition between them, the end of the thin rod is processed into an external thread and equipped with a nut, and the thick rod is processed into a plane and hollowed out to form a cavity (1.1). 5. A detachable wedge load test fixture according to claim 4, characterized in that: the upper fixture (1) is made of forged steel.